CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 28, 2025	Mar. 29, 2024
Income Statement [Abstract]
Revenue		$ 5,132	$ 5,211
Cost of revenue		(3,782)	(3,863)
General and administrative expenses		(825)	(970)
Operating income		525	378
Non-service FAS pension income and other, net	[1]	84	88
Interest expense, net		(150)	(176)
Income before income taxes		459	290
Income taxes		(73)	(5)
Net income		386	285
Noncontrolling interests, net of income taxes		0	(2)
Net income attributable to L3Harris Technologies, Inc.		$ 386	$ 283
Net income per common share attributable to L3Harris Technologies, Inc. common shareholders
Basic (in dollars per share)		$ 2.05	$ 1.49
Diluted (in dollars per share)		$ 2.04	$ 1.48
Basic weighted-average common shares outstanding (in shares)		188.5	189.8
Diluted weighted-average common shares outstanding (in shares)		189.1	190.8

[1] “FAS” is defined as Financial Accounting Standards.